The author of this piece knows that there are many homosexually-oriented men in the priesthood who are celibate. There just are. And one might guess who they are, but, because they are celibate, one will never know.
That's why a blanket policy against admitting homosexuals to the priesthood will never work. First, if they're celibate, you'll never know.
And, if they're celibate, why not admit them?